The answers to those question would depend on the contents of your persistence.xml file, may be you can post that? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4039928#4039928 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4039928